Length of vendor-oui is incorrect.

[jboyd77]

yang/standard/ieee/802.3/draft/ieee802-ethernet-link-oam.yang

Line 283 in afcb54a

typedef vendor-oui {

typedef vendor-oui {
  type yang:hex-string {
    length 6;
  }
  description "24-bit Organizationally Unique Identifier";
  reference
    "IEEE Std 802-2001, Clause 9";
}

The 'length' statement here applies to the base type string and not the length of the type hex-string. The type hex-string of the pattern xx:xx:xx ... so for a 3 byte OUI, overall length of the string is 8 inclusive of the : separators.